LM4128DMF-4.1

Voltage Reference Overview

The LM4128DMF-4.1 is a precision micropower series voltage reference manufactured by Texas Instruments, housed in an SOT-23-5 surface-mount package. It provides a nominal output voltage of 4.096 V with an initial accuracy of 1.0% and a maximum temperature coefficient of 100 ppm/°C. The device operates within a junction temperature range of -40°C to +125°C and features a typical supply current of 60 µA. It supports a maximum load current of 20 mA and includes indefinite short-circuit protection.

Voltage Reference Feature Summary

• Series topology design eliminates the need for external stabilizing capacitors while ensuring stability with capacitive loads up to 10 µF.
• Low quiescent current consumption enables efficient operation in battery-powered applications.
• Integrated enable pin allows for a low-power shutdown mode.
• Indefinite short-circuit protection limits output current during fault conditions.

Voltage Reference Applications

• Portable, battery-powered equipment
• Data acquisition systems
• Precision regulators
• Medical equipment

Voltage Reference Procurement Notes

Verify that the ordering suffix matches the required tape and reel quantity (1000 or 3000 units). Confirm the specific grade designation corresponds to the desired accuracy and temperature coefficient specifications before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when space constraints require an SOT-23-5 footprint and a 4.096 V reference is needed. Ensure the input voltage remains above the dropout threshold relative to the output voltage. Verify that the 1.0% initial accuracy meets the system requirements.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision micropower series voltage references. The 'D' suffix indicates the D-grade specification level, which defines the 1.0% initial accuracy and 100 ppm/°C temperature coefficient parameters.

Voltage Reference Replacement Considerations

LM4128BMFX-4.1/NOPB

Voltage Reference FAQ

Does the LM4128DMF-4.1 require an external capacitor for stability?

No, the advanced design eliminates the need for an external stabilizing capacitor, though it remains stable with capacitive loads up to 10 µF.

What is the function of the Enable pin on Pin 3?

The Enable pin controls the device state; pulling it low activates a shutdown mode with reduced supply current.